Pulley.



Patented May 6, I902.

F. ALBERT.

P U L L E Y.

(Application filed. Sept. 29, 1900 (No Model.)

mm esses.

Inventor.

UNITED STATES PATENT OFFICE.

FRIEDRICH ALBERT, or NUREMBERG, GERMANY.

PULLEY.

SPECIFICATION forming' part of Letters Patent N 0. 699,434, dated May 6, 1902. Application filed September 29, 1900. Serial No. 31,573. (No model.)

To all whom it may concern:

Be it known that I, FRIEDRICH ALBERT, manufacturer, a subject of the King of Bavaria, German Empire, residing at Nuremberg, Bav aria,Germany, whose post-offlce address is Nos. 9 and 11 Mathildenstrasse, Nuremberg, Bavaria, have invented certain new and useful Improvements in Pulleys Formed from Bendable or Pressable Material; aud'I do hereby declare the'following to be a full,

' clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains to make and use the same.

The purpose of this invention is to substitute for the pulleys hitherto produced from cast-iron pulleys made from light but at the same time firm bendable or pressable material, and this I accomplish by forming the wheel in sections and in other respects in the manner hereinafter described.

In the accompanying drawings, Figure 1 is a side elevation, partly in section, of a pulley structed, herein one hundred and eighty degrees. A central longitudinal strengthening and stiifening bulge a, transversely corrugated to afiord regularly-spaced transverse projections Z7, forming a sort of toothing, is then struck up from this sheet,,leaving marginal flanges or edges 0 and extreme ends d, smooth and flat and below the plane of the bulge, and the sheet is concurrently bent into a regular are, as shown a semicircle, the fiat ends d being bent inward parallel with the-diits complement.

ameter of said circle. These ends are then united by a tie-barE, preferably havinga central longitudinal strengthening-bulge e and nave-section e struck up therefrom,the bulge extending practically the whole length of the bar with the exception of jogged ends f, which overlap and are to be secured to the inturned ends of the rim-section, and said bulge leaving flat margins or flanges G on each side thereof, which at gare carried around the nave and form the bearing surface or hu'b thereof, the straight reaches g also serving as means whereby the section is attached to A second rim-section A, formed in the same manner and upon the same radius with its corresponding tie-bar E, is now applied to the first section and united thereto by bolts h, passing through the jogged endsf at the two tie-bars and the inturned ends of the two sections, also through the straight reaches g of the lateral flanges of the tie-bars, thus completing the pulley. v

The circumferential central bulge of the rim formed'by the union of the sections se-' cures maximum rigidity, while the transverse toothing causes an increase of adhesion as the tightened belt seeks to press into the gaps between successive teeth.

I claim A pulley comprising a plurality of sections, a

each section consisting of a segmental rim with inturned ends, smooth marginal edges, and a central peripheral bulge crossed by transverse corrugations, and also a tie-piece constituting one member of the nave and uniting saidinturned ends, the matching tiepieces of the several sections being bolted to gether.

In testimony whereof I affix my signature in presence of two witnesses.

FRIEDRICH ALBERT;

Witnesses:

AUX WIELE,

MAX SCHNEIDER. 

